title: [A simple method to determine the main direction of the frontal vector loop].
mesh_terms: D004562:Electrocardiography; D005260:Female; D005822:Genetic Vectors; D006801:Humans; D007434:Intrauterine Devices
keywords: ELECTROCARDIOGRAPHY
vernacular_title: Eine einfache Methode zur Bestimmung der Hauptrichtung der frontalen Vektorschleifen.